Functional check:

WARNING: This page is about a different car, the 2002 Volkswagen Cabrio, 2001 Volkswagen Cabrio, and 2000 Volkswagen Cabrio. However, it is still accessible from the selected car via links, so may be relevant.

Switch ignition on:
- The MIL must light -up.

If the MIL does not light-up with ignition switched on:

Check MIL lamp wiring / MIL lamp bulb using wiring diagram.
If OK:
Check instrument cluster/ECM, and replace if necessary.
Check DTC memory, if necessary, repair any malfunctions and then erase DTC memory. See Diagnostic Trouble Code (DTC) memory .
Display readiness code (see READINESS CODE, DISPLAYING ). If DTC memory has been erased or engine control module was disconnected from permanent positive, readiness code must be generated again. See READINESS CODE, GENERATING .

If the Malfunction Indicator Lamp (MIL) lights up with the ignition switched on, continue check as follows:

Start engine and run at idle.
The Malfunction Indicator Lamp (MIL) must go out after a few seconds.

If the Malfunction Indicator Lamp (MIL) does not go out:
Check DTC memory. If necessary, repair any malfunctions and erase DTC memory. See Diagnostic Trouble Code (DTC) memory .

If no DTCs are stored:

Check Malfunction Indicator Lamp (MIL) wiring using wiring diagram.

If OK:

Check instrument cluster / ECM, and replace if necessary.
Check DTC memory, if necessary, repair any malfunctions and then erase DTC memory. See Diagnostic Trouble Code (DTC) memory .
Display readiness code (see READINESS CODE, DISPLAYING ). If DTC memory has been erased or engine control module was disconnected from permanent positive, readiness code must be generated again. See READINESS CODE, GENERATING .